NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

35 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 925
ONVOY, LLC - CA 24
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 5
BANDWIDTH.COM CLEC, LLC - CA 2
TELNYX LLC 1
T-MOBILE USA, INC. 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-08-26 925-261-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PSBG WEST CA
2005-08-26 925-282-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAFAYETTE CA
2005-08-26 925-520-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASANTON CA
2005-08-26 925-520-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASANTON CA
2005-08-26 925-553-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DANVILLE CA
2005-08-26 925-553-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DANVILLE CA
2005-08-26 925-553-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DANVILLE CA
2005-08-26 925-566-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2005-08-26 925-566-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2005-08-26 925-566-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD CA
2005-08-23 925-264-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2005-08-23 925-353-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2005-08-23 925-353-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2005-08-17 925-308-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ECONTRCOST CA
2005-08-16 925-300-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2005-08-15 925-208-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DANVILLE CA
2005-08-10 925-271-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLEASANTON CA
2005-08-10 925-452-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DUBLN-SNRM CA
2005-07-26 925-232-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PSBG WEST CA
2005-07-22 925-914-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLAYTON CA
2005-07-21 925-922-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PLEASANTON CA
2005-07-13 925-354-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ANTIOCH CA
2005-07-13 925-451-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT CRK CA
2005-07-11 925-663-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SUNOL CA
2005-07-07 925-270-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2005-07-07 925-270-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2005-07-07 925-588-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2005-07-07 925-588-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2005-06-09 925-219-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2005-06-09 925-219-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2005-06-09 925-395-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2005-06-08 925-605-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LIVERMORE CA
2005-06-08 925-886-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E DANVILLE CA
2005-05-22 925-268-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MORAGA CA
2005-05-22 925-320-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MORAGA CA
2005-05-22 925-320-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MORAGA CA
2005-05-22 925-835-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SUNOL CA
2005-05-22 925-835-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SUNOL CA
2005-05-22 925-835-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SUNOL CA
2005-05-22 925-860-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SUNOL CA
2005-05-18 925-276-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLAYTON CA
2005-05-18 925-304-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLAYTON CA
2005-05-18 925-304-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CLAYTON CA
2005-05-18 925-304-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CLAYTON CA
2005-05-18 925-470-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2005-05-18 925-470-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2005-05-18 925-522-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2005-05-18 925-522-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2005-05-18 925-522-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH CA
2005-05-18 925-807-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BSHP RNCH CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.